Improved mode of preventing nuts from unscrewing



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UNITED STATES PATENT OEEICE.

SAMUEL NOBLET, OF HALIFAX, PENNSYLVANIA.

MPFEOVED MODE OF PREVENTING NUTS FROM UNSCREWING.

Speeifeation forming part of Letters Patent No. 21,574, dated September21. 1858.

To all whom it' may cm1/cern:

Be it known that I, SAMUEL NOBLET, of Halifax, in the county of Dauphinand State of Pennsylvania, have invented a new and Improved Mode ot'Preventing'Nuts i'rom Unserewing from Bolts; and I do llerebydeelare thefollowing to be a eorreet description of the saine, ret'erenee being hadto the aecompanying drawings, in which- Figure l is a top View of apiece of timber having various modifications of my invention applied tobolt heads and nuts. Fig l represents a longitudiilai section ot' thesame through the line tc :n of Fig. i.

The same letter marks the same part in both figuresv The nature oi'myinvention consists in preventing nuts or boltssheads :t'rom turning byinserting below them a vflexible inetalliewasher, one end of which isturned up against the head or nut and the other held inxmovably in plaeeeither by being sunk into the body oi the timber through which the boltpasses Aor by being turned down over some rigid p0rtion of the same, orby being held by another bolt, all as hereinafter described and shown.

In the drawingslhave shown va ri ous modes of applyingmy invention,aeeoring to the character ot the position where the bolt is to be usedor the purpose it has to serve.

A shows the invention applied in a situationwhere the nut u, coming` npagainst a square shoulder, cannot be turned. In this ease the washer bis placed under the head ofthe bolt, and when this is screwed down.tight one end of thew'asheris turned up against the head `of the boltand the other end is turned down over the edge of the timber, as shown.

I5 shows a boit having' a square head let into the wood. The washer b isplaced u'nder the nut and one end turned up against the side. rihevotherend is square up against the shoulder ofthe timber, as shown.

C shows a position where a piece of iron is -it fitting the square partof the bolt.

fined by a washer turned up against its side, the other end of saidwasher being turned down over the edge of the timber.

E represents an arrangement of bolt comv monly used upon bridges. Thehead of this bolt is let into the timber, and a large iron washer E ofthe form represented is placed below the nut e. lietween this washerandtheuut-'is plaeed my thin met-allie washer, one end of which is bent upagainst the nut and the other end turned down over the straight-edge ofwasher E.

F represents a case where a east-iron stop or shoulder h" is attached tothe wood for the purpose ot giving a bearing to the end ot the washerif, one end of which is turned up against the side of nutf and the otherabuts against t-he east-iron stop 11"'.

G shows a ease Where a large east-iron Washer G is inserted under thelhead of the bolt, the head being .let into the washer, as shown. Underthe nut g is the thin washer b5, two corners of which are driven int-othe timber and one end turned up againstthe nut g.

II is the ease of a squa re bolthavinga round head. This bolt tits intoa square holein the timber and the washer li has a square hole in Thisprevents the washer from turning, and one end of the washer being turnedup aga-inst the nut 71. holds it securely in place.

I represents the ease in which one lwasher bis common to two nuts i i. Asimilar washer may be placed under the two heads of the bolts.

J is a round bolt with the head letinto the timber. The washer, which isnot shown, is turned up against the nut and down over the edge of thetimber, as before.

K is a square bolt, thehead ot' which is not let into the timber, andthe washer applied as in the ease J.

I is the ease of a round bolt, the head oi' which is let in, and thewasher seein-ed by driving three ot' corners into the timber, the fourthcorner being turned up To hol d the nut, as shown. y

M shows a ease where the washer Zim' is turned over a beveled edge.

N is the ease where two bolt-heads are. held by a common washer Z111.

The Washers may be made of any iiexible metal and of the thicknessrequired hy 'the the head or unt and the other held immovably degree ofsil-ain to which theyarelikely to be in place, substantially ashereinbef'ore deexposed. scribed and represen Led.

Having thus fully described my invention In. Witness whereof l havehereunto sel'. my and shown a variety of eases in Whiel it may lizindthis 31st. day of Angnsf, i858. he applied, what I claim, and desire toSeem-e by Letters Patent, is SAMUEL .NOBLET Preventing bolt-heads ornuts from turning Witnesses: by inserting below them a iexible metalliclTNO. G. THQMPSON, washer, one end of Whieh is turned up v gainst CHAs.F. STANSBURY.

